Nut-making machine.



Patented Nov. 7, 1916.

13 SHEETS-SHEET I.

WITNESSES a A TTREV E. BURDSALL.

NUT MAKING MACHINE.

APPLICATION FILED NOV-24.1913.

Patented Nov. 7, 1916.

I3 SHEETS-SHEET 2.

A TTORIVE) E. BURDSALL.

NUT MAKING MACHlNE.

APPLICATION man Nov,24.1913.

Patented Nov. 7, 1916.

- 13 SHEETS-SHEET WITNESSES:

E. BURDSALL.

NUT MAKING MACHINE.

APPUCATION HLED NOV-24.1913.

Patented N037. 7,1916.

13 SHEETS-SHEET 4.

JIW/E/VTOH A TTOR/VEY E L w E w W E. BURDSALL.

NUT MAKING MACHINE.

APPLICATION 111.150 NOV. 24. 1913.

Patented Nov.

WITNESSES:

E. BURDSALL.

NUT MAKING MACHINE.

APPLICATION FILED NOV. 24, 1913.

Patented Nov. 7, 1916.

I3 SHEETS-SHEET 6.

mm/ro/e dflwdz,

ATTORNEY w .w. M 6 E m Q09 =3 2 M a O A w E. BURDSALL.

NUT MAKING MACHlNE.

APPLICATION FILED Nov 24, 1913.

13 SHE'ETS-SHEET 7.

l/Vl/E/VTOR Patented Nov; 7, 1916.

I I A I I I 1| WITNESSES:

E. BURDSALL.

NUT MAKING MACHINE.

APPLICATION FILED NOV. 24. 1913.

Patented Nov. 7, 1

13 $HEETSSHEET g ATTORNEY WITNESSES WITNESSES:

mge. MK

E. BURDSALL NUT MAKING MACHINE.

APPLICATION FILED May. 24. 1913.

Patented Nov. 7, 1916.

I3 SHEETS-SHEET 9- INI/ENTOR E. BURBSALL.

NUT MAKlNG MACHINE.

APPLICATION FILED Nov. 24. 1913.

Patented Nov. 7, 1916.

13 SHEETS-SHEET 10- QHH mam baa man I/Vl/E/VTOR i TONEY WITNESSES E.BURDSALL.

NUT MAKING MACHINE.

APPLICATION FILED NOV- 24. m3.

1 ,203,698. Patented Nov. 16.

i3 SHEETS-SH W/ TNESSE 8 00W 1 914MB E. BURDSALL.

NUT MAKING MACHINE.

D NOV. 24, 1

Patented Nov. 7, 1916.

.IIVVENTOR WIN/56355 I I W 4. 48213 V W W W E. BURDSALL.

NUT MAK IIIIIIIII E.

. APP; 111111111111111111111111 1,203,698. Patented Nov. 7, 1916.

SSSSSSSSSSSSSSS 3.

I Hwy UNI STATES PATENT OFFICE.

ELLWOOD BURDSALL, 0]! PORT CHESTER, NEW YORK, ASSIGNOR T0 RUSSELL BURD-SALL & WARD BOLT AND NUT 00., OF PORT CHESTER, NEW YORK, A CORPORATIONOF NEW YORK.

NUT-MAKING MACHINE.

Specification of Letters Patent.

' Patented Nov. '7, 1916.

Application filed November'24, 1913. Serial No. 802,623.

To all whom it may concern:

Be it known that I, ELLwoon BURDSALL, a citizen of the UnitedStates,-residing at Port Chester, in the county of VVestchester andState of New York, have invented certain new and useful Improvements inNut- Making Machines, of which the following is a. full, clear, andexact description, such as will enable others'skilled in the art towhich-it appertains to make use the same.

This invention relates to metal working machines, and with regard tocertain more specific features thereof to machines for the production ofnuts or nut blanks from stock bars.

One of the objects of the invention is the provision of a practicalautomatic apparatus for the rapid production of nut blanks.

Another object of the invention is the provision of an efficientautomatic apparatus for the rapid production of high grade crownedsquare nut blanks from cold stock.

Still another object of the invention is to provide a compact apparatuscombining the functions of the machine in single operations thereof. asfar as practicable, thereby obtaining a high degree of efficiency inpoint of speed.

Other objects will be in part obvious and in part pointed outhereinafter.

The invention accordingly consists in the features of construction,combinations of elements and arrangement of parts which will beexemplified in the construction herein after set forth, and the scope ofthe application of which will be indicated in the following claims.

To promote a further understanding as to the manner in Which thisinvention may be carried out, drawings, exemplifying a preferredembodiment of the invention have been appended as a part of thisdisclosure, and in such drawings like characters of reference denotecorresponding parts throughout the several views of which- Figure 1 is aplan view of a nut making machine embodying this invention, Fig. 2 is a.front elevation of Fig. 1, Fig. 3 is a rear elevation of Fig. 1, Fig. 1is an enlarged view of the reciprocating slide shown in Fig.

1 which carries the perforating punch and the shearing punch, Fig. 4 isan enlarged leftend elevation of Fig. 1, Fig. 5 is an enlarged view ofthat portion of the machine shown in Fig. 1 which accomplishes thestraightening of the stock bar, Fig. 6 is an enlarged view taken on theline 6-6 of Fig. 1, Fig. 7 is a view of the feeding mechanism for thestock bar, Fig. 8 is a sectional detailed view of a portion of Fig. 6,Fig. 9 is an enlarged view of a section of the machine taken on the line'9-9 of Fig. 1, Fig. 10 is a sectional view of the machine taken on theline 1010 of Fig. 4, Figs. 11 and 12 are respectively an elevation ofthe perforating and shearing punch mechanism, and a vertical centralsection taken through the perforating punch, Fig. 13 is a sectional viewtaken on the line 1318 of Fig. 1 show-. ing the actuating mechanism forthe clamp which holds the stock bar during the perforating operation,Fig. 14 is a central longitudinal sectional view taken through thecrowning die, Fig. 15 is a view similar to Fig. 1-L with certainmechanism removed to show more clearly the stripper and its actuatingmechanism, and Fig. 16 is a perspective view of the crowning die showingthe relativeposition of the plunger when the nut blank is being crowned.

Referring now more specifically to the drawings, the numeral 1 indicatesa. frame providing bearings 2 for a main driving shaft 3 driven by abelt on the driving pulley 4. A bevel gear 5 is fixed to the maindriving shaft 3 and meshes with a bevel pinion 6 which in turn isfixedonthe end of a shaft 7 supported longitudinally of the machine bybearings 8 projecting from the rear of the frame 1. ()n the opposite endof the shaft 7 there is fixed a bevel gear 9 meshing with a bevel gear10 on a cam shaft 11 which is supported in bearings 12 extending fromthe left end of the machine. The main driving shaft 3 is provided withan eccentric member '14 which in turn is surrounded by a bearing 15 of aconnecting member 15' which is in turn pivoted to a slide member 16 andin consequence of this construction the rotary movement of the shaft 3is transposed into a reciprocating movement of the slide 16. Mountedupon the slide 16 are the two punch members which will behereinafter.described. The shaft 3 also carries an eccentric member 17which is surroumled by a strap 18, said strap having a lugportion l9conuectiugwith a bar 20. the purposes of which will be hereinafterdescribed. The numeral 21 indi- 'cates the stock bar and the same isintroduced into the machine manually through the straightening device22. the feeder 23 and the positioncr 24.

The stock bar straightener comprises a frame portion attached to thebody of the machine at 26. The frame 25 is provided with ways 27 inwhich is disposed an adjustable slidable supporting member 28 positionedtherein with. respect to its longitudinal movement by means of screws 29and substantially fixed relative to the frame 25 during the operation ofthe machine. This supporting member 28 has mounted thereon twostraightening rollers 30 and 31 and has also mounted thereon a secondaryslide 32. A spindle 33 is tapped into the left end of the slide 32 andhas a bearing in the left end of the frame 25. ()n the extreme left endof the spindle 33 there is pivotally mounted an arm 34 terminating in ahub 35 which surrounds the spindle 33. This hub is constructed on itsinner end with diametrically opposed cam teeth 36 and projecting fromthe left end of the frame 25 is a boss 37 having correspondingdiametrically opposed teeth 38. A spring 39 is interposed between theend of the slide 32 and the frame tending to urge the secondary slide 32in a direction toward the right of the machine. When the arm 34 is in aposition permitting of the engagement of the cam teeth on the hub 35with the cam teeth on the boss 37, in what may be termed an intermeshingrelation, the spring 39 is permitted to urge the slide in a direction tocarry a roller 40 away from the rollers 30 and 31, allowing suitablespace for convenient introduction of the stock bar 21 between therollers 30 and 31 on the one side and the roller 40 supported on thesecondary slide 32 on the opposite side. When it is desired to overcomethe action of the spring 39 and draw the roller 40 in av directiontoward the other two rollers so as to dispose the several rollers in barstraightening position, the arm or handle 34 is moved into a position tobring the teeth out of their intermeshing relation and into a positionWhere the face of one tooth abuts the face of the opposite tooth whereit serves as a locking means to hold the roller 40 in its then position.This type of hand operated adjusting device is quite commonly usedthroughout the machine, and for convenience in expres sion it will betermed a cam locking and unlocking device.

For various reasons the stock is coiled when presented to the machineand the mechanism just previously described is designed to straightenthe irregularities in the stock as it unrolls from the coil. It will beseen that a three point bearing is provided, two points of which are onone side of the stock and one point of which is on the opposite side ofthe stock disposed centrally between the other two points in the line offeed of the stock.

The stock bar feeder consists of a gripping means in the nature of avise and a translating means for reciprocating such vise. The grippingmeans comprises a rock lever 4.1 having an actuating end 42 and anactuated end 43 which latter carries a roller 44 pivotally mounted at45. The rock lever 41 rocks about a pivot 46 and the actuating end 42 isequipped with a cam locking and unlocking device 47 similar to the onejust previously described in connection with the straightener, exceptthat the hub 48 carrying the arm or handle 49, which corresponds to thehub 35 carrying the arm or handle 34 in the straightener, has norelative longitudinal movement with the shaft or spindle 50. A gripperjaw 51 is provided on its left face with teeth coacting with the camteeth on the hub 48 and this member may enjoy a relative longitudinalmovement in a bearing integral with the rock lever 41. A. verticallyreciprocating block 53 is provided with a cam portion 54 coacting withthe cam roll 44 carried in the actuated end 43 of the rock lever 41.This block 53 is actuated by a rock lever 55 pivoted at 56 and in turnactuated by a face cam 57 keyed to the main driving shaft 3 in whichtravels a cam roll 58 carried by the extreme end 59 of the rock lever 55(shown clearly in Fig. 2). The block 53 has accordingly an intermittentvertical; reciprocatory movement and when in its lower position shown inFig. 2 the cam roll 44 is urged to the left by means of the cam 54, andthe rock lever 41 swings about the pivot 46 bringing the gripper jaw 51into contact with the stock bar 21. The actuated end 43 of the rocklever 41 contains a heavy coil spring 60 (see Fig. 8), the same beingdisposed between a block 61 carrying the cam roll 44 and a threadedmember 62 threaded into the extreme left end of the actuating portion 43of the rock lever 41. It will be obvious therefore that the spring (30is disposed, so to speak, between the block 53 and the gripper jaw 51and the gripping is accordingly of a yielding character but suflicientto efficiently advance the stock bar under normal operation of themachine.

The before mentioned pivot 46 has bearlift) member 63 is in turnsupported by the frame 1. The slide 62 carries a gripper jaw 65 whichcoacts with the gripper jaw 51 in clamping the stock bar 21 between themand it is to be noted that the entire gripping apparatus is connected tothe slide 62 apd movable independently of the fixed support ing member63. The block 53 has a channel 66 extending for some distance in thedirection of travel of the slide 62 and suitably constructed so that atall times it remains in engagement with a tongue 67 projecting from therock lever 55 through an opening 67, in the member 63. The movement ofthe slide 62 is accomplished through the agency of a lex'er 68 journaledin bearings 69 on the frame and pivotally connected to the slide at 70.This lever 68 carries a cam roll 71 and is actuated by a barrel cam 72on the main driving shaft 3. It will be seen therefore that the stockbar feeder comprises a gripping means and a reciprocating slide, thegripping jaws being adapted to coact in gripping relation during themovement of the slide toward the rear of-the machine for the reason thatthe cam 57 has caused the block 53 to be moved into its lowermostposition and to dwell there during the period of travel of the slidetoward the rear of the machine which is a distance designed to be equalto the length of one nut blank. Vhen the slide has completed itsmovement in the rearward direction the cams are so timed that the block53 rises allowing the gripping jaws 51 and 65 to become separated.

The stock bar 21 is consequently released and the jaws remain in openposition during the return period of the slide. I

The positioning means for the stock bar comprises a rock lever 73disposed above the path of travel of the stock bar and a rock lever 74disposed below the path of travel .of the stock bar, said levers havingrespectively actuating ends or fingers 7 and 76 adapted when in normallyoperative position to contact with the stock bar for some considerabledistance on the upper and lower sides thereof as it is fed. An adjustingbolt 77 is provided to control the position of the actuating end of thelever 74 and a threaded shank 78 is-provided to control the position ofthe adjusting end of the lever 73. Interposed between the upper end ofthe lever 73 and a bracket 79 fixed to the frame 1 is another camlocking and unlocking device 80, this for the purpose of lifting theactuating end of the lever 73 sufliciently out of the path of the stockbar to allow the latter to be conveniently passed into the machine. Itwill readily be seen that this may be accomplished without destroyingthe adjustment of the lever 73. One of the purposes of this positioningdevice is to present and support the stock'centrally opposite theperforating punch and it is to be noted that minute adjustment may beobtained and that by means of the cam locking and unlocking deviceemployed the actuating end 75 may be moved out of its operative positionand back again without varying the adjustment which has previously beenmade. The actuating ends 75and 76 of the levers 73 and 74 also serve tosupport the latter. end. portion of the stock after it has passed fromthe straightening and feeding devices.

The clamping mechanism comprises a substantially wide upstanding plate81 having a reduced portion 82 extending downwardly .into a recess 83 ina bracket 84 fixed to the main frame of the machine and also having apassageway 200 through which a perforating punch passes. The recess 83has its longitudinal walls slightly rounded as shown in Fig. 13 in orderto permit a slight pivotal movement of the plate 81 therein. This plate81 is provided with a recess 85 in the upper portion thereof in which isloosely disposed the squared end portion 86 of a rod 87 which extendstoward the left end of the machine and passes through a lever arm 88.Said rod has a head 87 which is adapted to contact with the face ofplate 81. A collar 89 is provided on the rod 87 and the end of the rodis threaded to receive the nuts 90 for purposes of adjustment.Projecting from the frame 1 on this left end of the machine is a halfround bearing member 91 which is adapted to act as a fulcrum for thelever arm 88. There is also projecting from the frame of the machinejust above the member 91 a shank threaded on its outer end to receivenuts g93 for purposes of adjustment. A spring 94-.surrounds the shank 92adjacent the inner face of the nut 93. The spring 94 extends into arecess 95 in the lever arm 88 and bears at its inner end upon a shoulder96. This spring tends to force the upper part of the lever arm 88 towardthe right of the machine and is only prevented from so doing by a rocklever 97 carrying a cam roll 98 which coacts with a cam face 99 providedon the lower end of the rock lever arm 88. A cam 100 on the cam shaft 11coacts with a cam roll 101 carried by an arm 102 of the rock lever 97,and this cam is so timed in operation that during the perforating andshearing operations the cam roll 98 is in its upper position shown inFig. 13, in which position the lower end of the lever arm 88 is movedtoward the right of the machine about the fulcrum 91 overcoming theaction of the spring 91, moving the upper end of the lever arm 88 towardthe left and consequently causing the plate 81 to securely clamp thestock bar against the perforating dies. It will now be obvious thatduring the perforating operation of the machine the stock bar ispositioned properly with respect to the punch, and is also clampedfirmly against the die &

bv means of the plate 31 and the mechanism just u'eviously'described.

f/zc mac/ling 1ncc7mm'sm.-Of the punches provided in this machine, onemay be termed. for convenience. the perforating punch. the other may betermed the shearing punch. The perforating punch is shown in Figs. 11vand 12. the numeral 103 representing a housing adapted to be clamped ina recess 104 in the reciprocating slide 16 by a clamping member 1105.This clamping member has two fingers 106 and 107 adapted to restrespectively on the housing 103 and on the slide 16. Extending betweenthese fingers through the clamping element is a bolt 103 having a nut10%). \Vhen it is desired to remove the housing 103 from the machine thenut 109 is unscrewed, loosening the clamping element 105 and the samemay be turned on the bolt 108 as a pivot bringing the finger 106 out ofengagement with the housing 103. A cylindrical sleeve 110 is adapted toslide within the housing 103 and within this sleeve 110 is fitted aperforating punch 1.11. This punch is held in position in the sleeve 110by a member 111 having a diametrical recess 112 and an enlarged head113. The head 1.13 has a chamfer 114 adapted to co-act with a chamfer115 on the lower end of a movable abutment or bar 116. In a bearingmember 117 bolted to the reciprocating slide 16 there is pivotallymounted a. hell crank lever 113. one arm of which serves as a handle andthe other arm of which serves as a connecting link between the pivot 119and a pin 126 which passes through the upper end of the bar 116. By thismechanism bar 116 may be thrown up and down at will and if the punch 111has in any way been moved back toward the reciprocating slide 16 thecoacting chamfers 114 and 115 respectively on the head 113 and the bar116 will cause the punch to be moved outwardly into operative position.The cylindrical plunger 110 is also provided with a diametrical slot orkey way 121, and the housing 103 has corresponding recesses 122 at thetop and bottom thereof. The before mentioned recesses are for thepurpose of allowing a wedge or key 123 to bepassed into the housingthrough the plunger andthrongh the punch for purposes of alinement andfor the further purpose of driving the tapered portion 124 of the punchfirmly against the seat 125 provided in the plunger 110. Vhen themachine is in operation, perforating, shearing and crowning nut blanks,it is of course understood that the slide 16 reciprocates carrying withit the. perforating punch and the shearing punch without any relativemovement between the housing, the plunger and the punch. It is, however,possible, by means of the construction just described to move thereciprocating slide back and forth without perforating the stock bar asif the handle of the bell crank lever 118 is moved in a direction tolift the bar 116, the punch 1.11 and the plunger 116 will merely retreatinto the space formerly occupied by this bar and the slide 16 may bereciprocated at will without doing any perforating. The punch 111 isalso adapted for slight lateral adjustment by means of an adjusting bolt126 hearing upon the housing 103. A filling block, or shim. 1.26, may beemployed to coiiperate in holding the punch 111 in proper relation tothe shearing punch. The reciprocating slide 16 also carries a. shearingpunch 127 which has three prominent functions, first, to shear from thestock bar the predetermined length of a nut blank, second, to assist incarrying the sheared nut blank into the crowning die, and, third, tofurnish the pressure to crown the same. A shear member. or block, 128,of tooled steel or other suitable material is adjnstably secured by aclamp 129 to a die supporting block securely held in the frame, 1, andhas a shearing edge 130 to coact with the shearing punch 127 to severthe stock bar. In this preferred form of the invention the shearingpunch is rectangular in cross section and bears against a short cylinder131 supported in a cylindrical recess 132 in the holder attached to thereciprocating slide 16. In and out adjustment of this shearing punch isprovided for by a wedge member 133 guided by an oblique wall 134 of a.recess 135 in the slide 16 and supported by a threaded shank 136 whichpasses through a bracket 137 and is held by a nut 138 threaded on theshank 136. The cylinder 131 of the shearing punch abuts theperpendicular face 139 of the wedge member 133 and the shearing punch127 is secured to the punch holder at tached to the reciprocating slide16 by a clamp 140. 'hen it is desired to adjust the position of theshearing punch 127 relative to the slide 16, the same may beaccomplished by loosening the clamp 140 and turning the nut 138, therebyvarying the position of the wedge 133 in a vertical direction, andsimultaneously varying the position of the perpendicular face 139 of thewedge. This wedge presents a substantial backing or abutment for theshearing punch 127 and when the proper adjustment of the Wedge has beenmade the punch 127 may be again clamped in position by tightening thenut 141. Two blocks 142 and 143 are adjustably secured by bolts 144 tothe die supporting block held in the frame 1. These blocks arerespectively grooved at 145 and 146 to permit of a slight degree ofadjustment. Block 142 has an inner face which serves as a register orstop for the advance end face of the stock bar and block 143 has aninner face which serves as a guide for the shearing punch and alsopartially as a support for the same against any lateral deflection.Adjust- 'tively against the outer ends of the blocks 14.2 and 143. I

In the use and operation of this machine the stock bar 21 is manuallyintroduced through the straightening device to the feeding mechanism.This may be accomplished conveniently and is greatly expedited by thetwo cam devices, one of which separates the rolls of the straighteningdevice and the other of which opens the gripper jaws. At the beginningof the operation the handles 84 and 49 of the straightener and feederrespectively are moved into the positions shown in Fig. 1, and the stockbar may be introduced farther into the machine automatically by thereciprocating slide and gripper mechanism which constitutes the feed. Asthe stock bar enters the positioning mechanism 24 the same is opened bymeans of the hand operated cam device hereinbefore described, and whenthe end of the stock bar has passed between the members 75 and 76 (Fig.10), the positioning device is closed, supporting the stock bar inproper vertical relation to the perforating punch. As has been beforestated, the clamping device comes into operation to securely clamp thestock bar against the perforating die just prior to the advancement ofthe punch to perforate. After the perforating operation, plate 81 isreleased from its clamping engagement with the stock bar and the lattermay continue on its travel toward the shearing punch, traveling adistance equal to the length of one nut blank each feed unit. \Vhen theend of the stock bar reaches the register block 142 it is then in aposition to be sheared and as the shearing punch moves to the left onits shearing stroke a plunger member 149, having the functions of agripper, a carrier or support and an ejector, moves toward the right.This plunger member 149 is actuated positively in this direction by acam 150, through the agency of a cam follower device comprising a camroll carrying arm 150' of a rock lever 150". The extreme right end orface 151 of the plunger member 149 is adapted to cooperate with theextreme left end 152 of the shearing punch to form gripper aws to gripthe stock, and effective gripping is insured by a spring 153 which tendsto urge the plunger member toward the stock. The end 151 of the plungercontacts with the left side of the stock bar 21 at substantially thesame time that the end 152 of the shearing punch contacts with the rightside thereof and the nut blank, or that portion of the stock which liesbetween the register block 142 and the shearer 128 is severed andcarried into a crowning die 154 by the continued movement of theshearing punch. The shearing punch has a reciprocatory movement, but thestock is sheared and the blank fed into the die and pressed against thehead by a movement of this punch in one direction, being held betweenthe end of the ejector plunger 149 and the advance end of the shearingpunch during the movement into the die.

The crowning or reshaping die 154, shown clearly in Fig. 16, comprises ahead or re- 7 shaping portion angularly disposed relative to the walls154 of a chamber opposite, or coaxial with said head. The lateral wallsof said chamber are rigid and very strong so as to withstand pressuretending to force them apart, and the space bounded by the lateral wallsis of a size to closely fit the lateral periphery or proximate face ofthe blank severed from the stock bar. The head is preferably formedintegral with the walls of said chamber, and comprises blank reshapingfaces 155 continuous with the inner lateral walls of the chamber, andinclined toward each other, or toward the axis of said die from theinner periphery of the chamber. In the present embodiment the reshapingfaces 155 are disposed one at each corner of the rectangular chamber sothat when a nut blank is pressed therein, it will be crowned. The diechamber and head are preferably formed in anintegral cylindrical blockof hardened steel which may be removably clamped in a recess therefor inthe die-supporting block opposite the path of travel of the shearingpunch, a substantial screw 201 being employed to hold the die in place.The die chamber and head may be duplicated at the opposite end of theblock, should the die first in use be worn or otherwise objectionable.In the head of the die is an opening or passageway communicating withthe chamber of the die, and the ejector plunger 149 is adapted to movein this opening. The advancing shearing punch causes the reshaping orcrowning of the blank by pressing the blank against the die head withsufficient force to cause the stock to yield, and as the walls of thechamber are rigid the pressure causes the stock to be crowded into theblank without enlarging the outside lateral dimensions of the blank,

"proy iding a nut of great strength and into the opening to contact withthe plunger 149, and as the force thus operating against the plungerandthe parts operating the same would be great, a safety device 1sprovided ermitting the plunger 149 to yield before suflicient pressureis attained to detrimentally affect the more delicate parts, as willhereinafter appear.

Vhen it is desired to shear the stock bar at a point intermediate theperforating punch and the feed, as, for example, when the end of thestock bar is proceeding toward the punches, the same is accomplished bya supplementary shearing. mechanism. This shearing mechanism comprisesafixed shear member 157 and a movable shear member 158, the latterconstructed with an aperture 159 through which the stock bar passes. Aspring 160 normally urges the shear 158 toward the right, and a nut 161on the threaded end of a shank 162, which has its other end tapped intothe shear 158, serves to limit the movement in that direction. Theaperture 159 is normally disposed in the path of travel of the stock bar21. The bar 20 has a continuous reciprocatory movement caused by itseccentric connection with the main driving shaft 3 and the left end ofthis bar 20 is disposed in longitudinal alinement with the movable shearmember 158. The frame 1 has secured thereto a bracket 1.63 and a bearingbracket 164. Journaled in the bearing bracket 164 at 165 is a rock lever166 having an arm 167, a handle 168 and a lug 169. Intermediate thehandle 168- and the journal 165 there is tapped a stud 170, and on thisstud hangs a depending filler 171, the purpose of which is to occupy,when desired, the space between the left end of the bar 20 and the rightend of the movable shear member 158. A slot 172 is provided in the upperend of the filler permitting a slight degree of longitudinal travel ofthe filler 171. When the filler is in its lowermost position, as shownin Fig. 9 of the drawings, the bar 20, 'the filler 171 and the movableshear member 158 move as though they were integral, the movement of theshear member to the left being caused by the eccentric, and the movementto the right being caused by the spring 1.60. It will be obvious fromthe foregoing description that when the shear member 158 is moved to theleft the stock is cut, and after the cutting the handle 168 Y may bereleased and a contractile spring 173 which extends from the bracket 163to the arm 167 will cause the filler 171 to be withdrawn from itsengagement with the bar first bar, which is at that time supported bythe positioner 24, and the feed of the second bar is imparted to thefirst. This insures the presentation of sufficient stock 0pposite theperforating punch at proper times, and also provides for utilizingpractically the entire stock bar and turning the same into finished nutblanks of proper dimensions. The perforating die is shown at 174removably secured to the frame and a channel 175 is provided in theframe to guide the waste stock from the machine.

After the nut blank has been reshaped, or crowned, in the mannerhereinbefore described, the plunger 149 is again urged tov ward theright of the machine by the cam 150 this movement being comprised in asuccession of steps. ues until the end 151 of theplunger issubstantially flush" with the outer face of the crowning die, this beingone step of the movement and while it isin this position for a certainangular travel of the cam 150 a deflector, or knockout 176 descendsrapidly and strikes and deflects the finished nut blank from its path ofejection, whence it falls out of the machine. This deflector 17 6 (seeFig. 15) is operated by a cam 177 on the cam shaft 1,1, and is so timedthat it descends at the instant just previously mentioned and thenquickly rises out of the path of the plunger 149 which then proceeds ina direction toward the right of the machine on its next step until itagain contacts with the stock bar at about the time the shearing punchcontacts with the opposite side of the stock bar. The cam 100 whichoperates the clamping mechanism and co-acts This movement continwith thecam roll 101 has a complement cam 178 which co-acts with the cam roll179 giving a positive movement to the rock lever 97 in the oppositedirection, and in the same way'the cam shaft 11 carries a second cam 180which co-acts with a second cam follower device comprising the cam roll181 to provide a positive return of the plunger 149 in the event that nostock is in the machine at the time. Thereis, however, a condition offloating of the cam rolls of the rock lever 150 withv respect to thecams 150 and 180 during a certain angular travel of said cams. This isfor the purpose of allowing the spring 153 full control of the plunger149 in urging the same toward the stock and insures a substantialyielding restraint and continuing pressure against said stock as thesame is being carried into the die. It will be obvious that when thereis stock disposed between the shearing punch and the plunger the formercauses the latter to retreat before it, directly pressing it through theintervening blank, andthe plunger is accordingly returned into the die.During this retreat the cam rolls float with respect to the cams and butonly slightly away therefrom so that if no stock is in position to begripped between the punch and the plunger the cam .180, being suitablyc'onstructed and timed, operates to cause a positive return of theplunger, thereby bringing it out of the path of the stripper or knockout176.

The connection between the plunger member 119 and the rock lever 150 ispurposely designed to be frangible and the same comprises a connectingmember 182'secured to the upper portion of the rock lever 150" by aslender bolt 183 and a nut 184. This connecting member has a tongue 185pivot ally engaging the bifurcated portion of a forked collar 186adjustable on the plunger 14 as indicated at 187. If in any way theplunger should be subjected to severe pressure tending to urge it beyondthe limits provided for by the engagement of the cam 150 with thecooperating cam roll on the rock lever 150 the bolt 183 is designed tobreak or strip the threads of the nut 184 thereby breaking theconnection between the plunger and its somewhat delicate actuatingmechanisn'i and protecting these more expensive and less convenientlyreplaced parts of the machine.

The feed of the stock bar may be varied by varying the position of thefulcrum of the rock lever 68. It will be noted that the bearings 69 areadapted for'adjustment on the frame 1.

By the above described construction is produced a machine capable ofrapidly automatically producing finished nut blanks from a metallicstock bar. The stock employed may be of any character usually employedin nut machines, but is preferably of low carbon steel, and the stock ispreferably fed into the machine cold. The crowning or reshaping die isso located relatively to the path of the shearing punch and the ejectoras to avoid complexity of construction and provide for simple movementsof the parts. The shearing punch moves in alinement with the reshapingdie, being designed to cooperate by its plane advance end to grip thesheared blank, move the same toward the reshaping head, and press thesame thereagainst, movement of said shearing punch in one directionbeing sufficient to accomplish these several functions. The ejector alsoparticipates in the feed of the blank into the reshaping die, moving atthe same time and in the same direction, and part of its ejectingmovement is also utilized to advance it into position for gripping asucceeding blank. In this manner these parts are disposed to afford aslittle idle motion as possible consistent with efficient operation. Themovement of the perforating punch is accomplished by the mechanism whichmoves the shearing punch, at the same time, and in the same direction,so

that no relative loss'of time occurs in the operation of these punches.A single movement in one direction of'thepunch carrying head is all thatis required to produce a blankand reshape or crown the same, andrepetition of this movement in cooperation with the bar feedingcentering and clampingdevices, etc., results in the production of anautomatic machine capable of accomplishing in a practical and highlyefiicient manner the ob ects hereinbefore referred to.

Having described my invention, what I claim as new and desire to secureby Letters Patent is:

'1. In an apparatus of the character described, in combination, a diecomprising a reshaping head and a chamber coaxial with said head, andmeans adapted to move a blank into and out of said chamber to causereshaping thereof, said means comprising a blank gripper movable towardand from said die and adapted to hold the blank as the same is beingmoved. 7 I

2. In an apparatus of the character described, in combination, a diecomprising a reshaping head and a chambercoaxial with said head, meansadapted to move a bar of stock into position. opposite said chamber, andmeans adapted to sever a blank from said bar and carry thesame underpressure into said chamber and against said reshaping head, said meanscomprising a blank gripper adapted to hold the blank as the same isbeing carried.

8. In an apparatus of the character described, in combination, a diecomprising a reshaping head and a chamber coaxial with saidhead, saidhead having an opening -communicating with said chamber, means adaptedto move a bar of stock into position opposite said chamber, areciprocatory I gripper jaw adapted to operate through said.

openmg, and a-reciprocatorypunch adapted on movement in one direction tosever a blank from said bar and press said blank' against said headthereby reshaping the blank, said punch providing a grippmg jaw adaptedto cooperate with said first-mentioned jaw to move said blank into' saidchamber on said movement in one direction,

1. In. an apparatus of the character described, in combination, a diecomprising a reshaping head and a chamber coaxial with said head, saidhead having an opening communicating with said chamber, means adapted tomove a bar of stock into position opposite said chamber, a reciprocatorycombined ejector andgripper jaw adapted to operate through said opening,and a reciprocatory combined punch and gripper jaw adapted on movementin one direction to sever a blank from said bar, cooperate with thecombined ejector and gripper jaw to move said blank into said chamber,and press said blank while in said chamber, said

